While on holidays in December last year, we had nearly a week of rain.
Here's a few photos I took between rain showers.

rain drops on the washing line

Busselton, Western Australia
Canon EOS 350D, 100mm f/2.8 macro @100mm, 1/125 sec, f/5, ISO400

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rain drops on the car

Busselton, Western Australia
Canon EOS 350D, 100mm f/2.8 macro @100mm, 1/1600 sec, f/4, ISO400

Even when it's raining, there are still plenty of photo opportunities - it's just a matter of looking around and seeing them.